Researchers are studying whether Ginkgo biloba leaves might support weary leg veins and cut the risk of blood clots.

Scientists have pioneered a new way to monitor sodium levels in the blood—without drawing a single drop. By combining terahertz radiation and optoacoustic detection, they created a non-invasive system ...

One reason is for camouflage; a giraffe's spots help it blend into its surroundings. The irregular markings break up the animal's outline, especially when sunlight filters through trees and shrubs.